Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Key Largo to Banjul as you normally would.
Due to multiple factors, expect to potentially pay more when booking in July. For low rates, January can be a great choice for travel to Banjul. Flights to Banjul from Key Largo in January are about $1,203 on average during January, but can be found for as low as $851.